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  3. Watertown
  4. December

Watertown, SD Climate in December

Temperature for December

In Watertown, SD during December the average high temperature is 26.9°F. The hottest day on record was December 1, 1998 when the temperature recorded was 59.0°F.

Watertown, SD daily average and extreme temperature range for December

Low Temperature

Overnight in December the average temperature drops below freezing at 8.9°F, with the lowest temperature of -30.1°F being recorded on December 31, 1973. On average there are 20 days in December when the temperature stays below freezing all day. In the worst December there were 31 days when the temperature did not make it above freezing. Overnight temperatures drop below freezing between 29 and 31 times in December.

Precipitation for December

In December the average monthly rainfall in Watertown, SD is 0.41 inches with rain usually falling on between 2 and 3 days. 1949 was the driest December with only 0.00 inches of rain falling, and 1992 was the wettest December with 3.18 inches of rain. The wettest single day in December was 30 December 1992 when 0.95 inches of rain fell.

In December it usually snows on between 11 and 12 days. In December there have been some years when thunderstorms have occurred, although there are other years when there hasn't been a thunderstorm in December.

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